Feature: Application: Alternative to EN47909, Injector Bore Cleaning Brush and Swabs Set for 6.6L Duramax Diesel. Funcion: Used to clean carbon build up from the injector bore (LLY) or sleeve (LB7). Includes: Including a brush used to loosen the carbon, and a method to be determined to clean away the residue, and cleaning swabs. Material: Both constructed with high standard Steel Wire, anti-corrosion and durable to use. Clean deeply and protect the injector bore/sleeves. Both detachable-design handle and brush adapters are perfectly matched and easy to install and remove. .